Portable fan



FIG. 1 is a top, front, right side perspective view of the portable fan of the present invention;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a back elevational view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a portable fan, as shown. 